libsysprof-analyze: add document type for task exit

We don't have any extra data here currently, but it can be nice to be able
to check a gtype when consuming frames.

src/libsysprof-analyze/sysprof-document-exit.c

@@ -0,0 +1,46 @@
+/* sysprof-document-exit.c
+ *
+ * Copyright 2023 Christian Hergert <chergert@redhat.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include "config.h"
+
+#include "sysprof-document-frame-private.h"
+#include "sysprof-document-exit.h"
+
+struct _SysprofDocumentExit
+{
+  SysprofDocumentFrame parent_instance;
+};
+
+struct _SysprofDocumentExitClass
+{
+  SysprofDocumentFrameClass parent_class;
+};
+
+G_DEFINE_FINAL_TYPE (SysprofDocumentExit, sysprof_document_exit, SYSPROF_TYPE_DOCUMENT_FRAME)
+
+static void
+sysprof_document_exit_class_init (SysprofDocumentExitClass *klass)
+{
+}
+
+static void
+sysprof_document_exit_init (SysprofDocumentExit *self)
+{
+}